Are newer DLP Endpoint Agents backwards compatibile with older Enforce and Endpoint Servers?
Are Endpoint agents backwards compatible?
While newer Endpoint Agent deployments may work with older Enforce/Endpoint Servers, Symantec has not tested the aformentioned configuration and considers it unsupported.
Symantec strongly recommends all customers apply Maintenence Packs on both Server and Agents.
Should extrenuating circumstances occur in which Server and Agents cannot be updated, Enforce and Endpoint servers should be upgraded ahead of agents.
For more information of older Agent compatibility with newer Enforce and Endpoint servers, please refer to the Symantec DLP Upgrade Guide.
Symantec Data Loss Prevention Upgrade Guides http://www.symantec.com/docs/DOC9258